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Pirelli
Pirelli P-Zero (PZ4) Sport 255/50R20XL 109W - 4159900
Pirelli P-Zero (PZ4) Sport 255/50R20XL 109W - 4159900
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The Pirelli P-Zero (PZ4) Sport in 255/50R20 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.
What 255/50R20 means
In the size 255/50R20, 255 is the section width in millimeters (10.04 in), 50 is the aspect ratio — the sidewall stands 50% as tall as the tire is wide, or 127.5 mm (5.02 in) — R denotes radial construction, and 20 is the wheel diameter in inches. That works out to an overall diameter of about 30.04 inches, turning roughly 671 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.
The service description on this tire decodes to a load index of 109 — a maximum load of 2,271 lbs per tire. The speed symbol W corresponds to a maximum sustained speed of 168 mph.
Load Range E corresponds to a 10-ply rating.
Specifications
| Size | 255/50R20XL |
| Tire Type | Summer |
| Service Description | 109W |
| Load Index | 109 |
| Speed Rating | W |
| Load Range | Extra Load |
| Section Width (mm) | 255 |
| Aspect Ratio | 50 |
| Overall Diameter (in) | 30.08 |
| Tread Depth (/32") | 9 |
| Treadwear | 280 |
| Traction Grade | AA |
| Temperature Grade | A |
| UTQG | 280AAA |
Frequently asked questions
What does 109W mean on the Pirelli P-Zero (PZ4) Sport?
109W breaks down as load index 109 — rated for 2,271 lbs per tire — with a W speed rating, good for a maximum sustained 168 mph.
What kind of tire is the Pirelli P-Zero (PZ4) Sport?
The Pirelli P-Zero (PZ4) Sport in 255/50R20 is a summer tire.
What are the treadwear and warranty ratings on the Pirelli P-Zero (PZ4) Sport?
This tire carries a treadwear grade of 280, traction grade AA, temperature grade A under UTQG.
Keep shopping
Shop all 255/50R20 tires, browse Pirelli tires, see every Pirelli P-Zero (PZ4) Sport size, or view all tires at ThreePiece.us.
- Brand:
- Pirelli
- Model:
- P-Zero (PZ4) Sport
- Size:
- 255/50R20XL
- Aspect Ratio:
- 50
- Load Index:
- 109
- Load Range:
- Extra Load
- Section Width:
- 255
- Service Description:
- 109W
- Speed Index:
- W
- Temperature:
- A
- Tire Rim Diameter:
- 30.08
- Tire Type:
- Summer
- Traction:
- AA
- Tread Wear:
- 280
- Tread Depth:
- 9
- UQTG:
- 280AAA
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